Struts1中map转换成json传到前台时取不到值——求指点！

Question

后台报这个：

• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED
• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED
• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED
• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED
• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED
• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED
• Property 'servlet' has no read method. SKIPPED
• Property 'servletFor' has no read method. SKIPPED

Java代码 ：

HttpSession session=request.getSession();
    String logincode= "";
    if(this.exportProvider==null){
        this.exportProvider=new ExportProviderImpl();
    }

    if (request.getSession().getAttribute("loginCode")!=null) {
        logincode=request.getSession().getAttribute("loginCode").toString();
    }
    try {

         response.setHeader("Content-Disposition", "attachment;filename=" + java.net.URLEncoder.encode("财务批量数据", "UTF-8") + ".xls");
         response.setContentType("application/vnd.ms-excel"); 
         HashMap maps=new HashMap();
         if (!"86".equals(logincode)) {
             maps.put("logincode", logincode);
        }
        Map m=this.exportProvider.getJigouYear();
        List l1=(List)m.get("年");
        List l2=(List)m.get("机构");
        JSONObject jo=JSONObject.fromObject(m);
        response.getWriter().print(jo); 
        response.getWriter().flush();
        response.getWriter().close();
    } catch (Exception e) {

        e.printStackTrace();
    }
    return null;

前台 ：

$.ajax({

type: "POST",

url: "../main/exportexclelist2.action",

//json格式接收数据

dataType: "json",

success: function (data) {

alert(data[i]);
}

});

}

Struts配置：

Answer 1